feat: add PluginDetailPage component and related functionality

- Introduced PluginDetailPage.vue for displaying detailed information about plugins.
- Enhanced the VitePress theme to register the new component.
- Updated CSS for responsive design and layout adjustments specific to the plugin detail page.
- Created utility functions for fetching and localizing plugin data from a JSON file.
- Added new markdown files for plugin details in both English and Chinese.

Author: qianlifeng